of Edinburgh , Session 1884 - 85 . 
159 
mometer C from lying on the mud at low water, a glass float D 
was employed, which was strong enough to keep the thermometer 
upright, but not to lift the weight attached to it. The accompany- 
ing illustration (fig. 1) represents the arrangement at low water. 
In the observations to be described the corrections for the thermo- 
meters have not been applied, as from the small number of readings 
obtained at each station the true temperatures can be of little im- 
portance, and since the same thermometer was used during each set 
of observations, the value for comparative purposes is not diminished. 
The mean temperature of the sea for each month during a period 
of five years (1858-1863) at Dunbar and at North Berwick, and 
for a similar period (1864-1866) at the Chain Pier, Trinity, is 
given in the following table (Table I.).* All three stations show 
Table I. 
Jan. 
Feb. 
Mar. 
Apr. 
May. 
June. 
July 
Aug. 
Sept. 
Oct. 
Nov. 
Dec. 
Year. 
Trinity, . 
39*4 
36 4 
38-7 
43-8 
49-0 
53-7 
56-0 
56-2 
53-6 
49-6 
44-9 
43-8 
47-1 
North 1 
Berwick j 
40-5 
40-0 
41 T 
44-2 
47-8 
52-2 
55-6 
55-6 
54-8 
50-9 
45-5 
42-2 
47-5 
Dunbar, . 
41-1 
401 
41-7 
44-5 
48-2 
52-4 
55-4 
55-8 
54-8 
50-7 
46-2 
42-9 
47-7 
one well-marked annual maximum between July and August, and 
one minimum in February. The range is greatest at Trinity and 
least at Dunbar ; and twice in the year, about April and November, 
the three curves almost coincide. 
Table II. shows the means for one year at Granton Quarry of the 
Table II. 
Jan. 
Feb. 
Mar. 
Apr. 
May. 
June. 
J uly. 
Aug. 
Sept. 
Oct. 
Nov. 
Dec. 
Year. 
Granton, . 
37-5 
38-8 
40-4 
42-0 
50-4 
54-7 
57-4 
58-6 
55-3 
49-4 
44-4 
39*7 
47-3 
surface temperature, and Table III. gives the same with the bottom 
temperature, and that of the air at 9 a.m. and 9 p.m., and the 
respective maxima and minima observed. In the quarry the effects 
of the proximity of land are very clearly observable, and the 
Jour. Scot. Met. Soc . , new series, i. p. 256. 
